Peno township is located in Pennington County, South Dakota. Peno township has a 2026 population of 32. Peno township is currently declining at a rate of 0% annually and its population has increased by 3.23% since the most recent census, which recorded a population of 31 in 2020.
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There are 0 adults, (0 of whom are seniors) in Peno township.
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